Internet Assigned Numbers Authority
AS12041 Afilias Canada, Corp.
inet6num: 0::/0 netname: ROOT descr: Root inet6num object country: EU org: ORG-IANA1-AFRINIC admin-c: IANA1-AFRINIC tech-c: TEAM-AFRINIC tech-c: TEAM-AFRINIC mnt-by: AFRINIC-HM-MNT mnt-lower: AFRINIC-HM-MNT status: ALLOCATED UNSPECIFIED remarks: This network in not allocated. changed: ***@ripe.net 20010724 changed: ***@ripe.net 20011024 changed: ***@ripe.net 20020805 changed: ***@ripe.net 20040503 changed: ***@ripe.net 20041229 changed: ***@afrinic.net 20050205 remarks: data has been transferred from RIPE Whois Database 20050221 source: AFRINIC organisation: ORG-IANA1-AFRINIC org-name: Internet Assigned Numbers Authority org-type: IANA country: EU # Country is really worldwide address: see http://www.iana.org remarks: The IANA allocates IP addresses and AS number blocks to RIRs remarks: see http://www.iana.org/ipaddress/ip-addresses.htm remarks: and http://www.iana.org/assignments/as-numbers e-mail: ***@ripe.net admin-c: IANA1-AFRINIC tech-c: IANA1-AFRINIC mnt-ref: AFRINIC-HM-MNT mnt-by: AFRINIC-HM-MNT changed: ***@ripe.net 20040417 changed: ***@afrinic.net 20050205 remarks: data has been transferred from RIPE Whois Database 20050221 source: AFRINIC
IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.
Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.